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#11271 - 05/21/02 01:04 PM Service active handling???
War Eagle C5 Offline
Junior Member

Registered: 05/21/02
Posts: 1
Loc: Athens, Ga
I have been getting this message every now and then. It seems to be happening more and more. Does anyone knpw anything about this?
Thanks,
Thomas

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#11272 - 05/21/02 02:39 PM Re: Service active handling???
BruceF Offline
Full Throttle Member

Registered: 11/30/00
Posts: 5259
Loc: Long Island, NY
You need to bring up the codes stored in the DIC to help diagnose the problem. Have a pen and paper handy to write them down. Then post them here.

The "diagnostic display" mode is entered with the following procedure:

Turn on the ignition but don't start the engine.
Press the "reset" button to turn off any warning messages
Press and hold "options" and
While holding "options", press "fuel" four times within a 10-second period.
_________________________
99 Navy Blue Metallic, black interior, 6 spd, Z51, HUD, R8C (Museum Delivery featured in the Jan 02 issue of Vette)

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#11273 - 05/23/02 10:43 AM Re: Service active handling???
Charlie Donald Offline
Member

Registered: 10/16/01
Posts: 72
Loc: CapeCanaveral Fl
I had the very same problem with my 2001 vert. it turned out to be a bad accelerometer. fixed under warrenty and located under the seat. However the codes will direct the troubleshooting

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#11274 - 05/23/02 10:45 AM Re: Service active handling???
Charlie Donald Offline
Member

Registered: 10/16/01
Posts: 72
Loc: CapeCanaveral Fl
PS War Eagle indicates an Auburn grad. I graduated from Athens State. Both good schools.

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#11275 - 05/24/02 01:58 AM Re: Service active handling???
GFC5 Offline
Member

Registered: 04/03/02
Posts: 131
Loc: Rocklin, California
Two days ago while I was out cruising around in my 2000 A4 convert, I had this same message displayed on the DIC along with the "TCS car" icon showing on the instrument cluster. This occured right after I had completed a severe pedel-to-the-metal WOT passing maneuver around another car. I check the DIC codes when I got home....the following were displayed:
TCS = C1282
SDM = U1040
SCM = B2605 and U1064

Also....when I started to pass the other car there was a noticable "pause" of about 1-2 seconds before the after-burner cut in....any reason for this hesitation during rapid acceleration????.....my Vette is pure stock except that I have replaced the original accordian throttle body air duct with a smooth coupler.

Puzzled in Sequim frown

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#11276 - 05/24/02 05:43 AM Re: Service active handling???
c4c5specialist Offline
Member

Registered: 07/10/01
Posts: 1612
Loc: conn
Hi there,
GFC5, your 1282 is a code for the Yaw rate sensor, and should be diagnosed.
It is important that this sensor function correctly, as your active handling will not function correctly, without this sensor.
Besttoyou, c4c5 hammer
_________________________
c4c5 Chevrolet dealership mechanic, ASE Master Technician w/L1. COFFEE ADDICT. A persons judgement is only as good as the information they have, which should be FACT, not fiction.


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#11277 - 05/24/02 01:03 PM Re: Service active handling???
GFC5 Offline
Member

Registered: 04/03/02
Posts: 131
Loc: Rocklin, California
To c4c5specialist....

Thanks for the advice about checking into the yaw rate sensor situation....I will have it looked at.

Two additional quick questions:

1. Do you have any thoughts about the acceleration "hesitation" I experienced during the WOT passing....is it ignition, fuel, or just the auto tranny???? confused

2. I looked up the idle relearn procedure in a set of 2000 Corvette service manuals (3 volumes) that I bought recently....and it's different than the post in the "Do It Yourself" section of this forum.....the manuals make no mention of removing fuses.....why so??? confused

Again, thanks for the help!! wink

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#11278 - 05/25/02 08:42 AM Re: Service active handling???
c4c5specialist Offline
Member

Registered: 07/10/01
Posts: 1612
Loc: conn
HI there,
If I could trouble you, please give me a detailed description of your passing hesitation issue.
As for the "DIY", I have not checked on that but will look into it.
Besttoyou, c4c5 hammer
_________________________
c4c5 Chevrolet dealership mechanic, ASE Master Technician w/L1. COFFEE ADDICT. A persons judgement is only as good as the information they have, which should be FACT, not fiction.


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#11279 - 05/25/02 05:05 PM Re: Service active handling???
GFC5 Offline
Member

Registered: 04/03/02
Posts: 131
Loc: Rocklin, California
c4c5specialist,

Thank You for taking your time on this, I'm happy to oblige,

I was doing about 50-55 mph as I pulled around this car to pass...I put the gas pedal to the floor...I'm assuming WOT....my Vette accelerated momentarly....then, there was a very noticable "hesitation" of about 1-2 seconds....it almost felt like it stalled...no unusual sounds however...then she just came alive!!...the transmission sounded like it was downshifting out of overdrive....the RPMs skyrocketed...what a kick in the pants....by the time I swerved back into my lane I was doing close to 90-95+ mph...then the "Service Active HNDLG" message showed up on the DIC and the "TCS Car" icon came on in the instrument cluster.

As I mentioned earlier, I have a 2000 A4 stock except for a smooth air coupler....however, I have never performed an idle relearn procedure.

I hope this helps....and thanks again for your assistance. savewave

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#11280 - 05/26/02 12:09 AM Re: Service active handling???
c4c5specialist Offline
Member

Registered: 07/10/01
Posts: 1612
Loc: conn
Hi there,
I will work on this, and repost later.
Besttoyou, c4c5 hammer
_________________________
c4c5 Chevrolet dealership mechanic, ASE Master Technician w/L1. COFFEE ADDICT. A persons judgement is only as good as the information they have, which should be FACT, not fiction.


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#11281 - 05/29/02 09:02 AM Re: Service active handling???
wrooney Offline
Junior Member

Registered: 10/27/01
Posts: 26
Loc: Allentown, PA
I got an error/warning message this weekend on my 2000 Coupe that stated:

Active Handling System Warming Up

Any thoughts on this?

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#11282 - 05/29/02 11:29 AM Re: Service active handling???
Anonymous
Unregistered


wrooney:

I understand that this is fairly normal, if it happens occasionally, with the system doing a self calibration.

I've had it happen to me in an autocross event, where I turned immediately after a rolling start, and never gave the system enough of a straight road to calibrate. The gong went off, which probably happened to you as well.

It's normal under those conditions.

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#11283 - 05/29/02 12:16 PM Re: Service active handling???
BruceF Offline
Full Throttle Member

Registered: 11/30/00
Posts: 5259
Loc: Long Island, NY
Quote:
Originally posted by wrooney:
I got an error/warning message this weekend on my 2000 Coupe that stated:

Active Handling System Warming Up

Any thoughts on this?
The Active Handling System (AHS) Warming Up message will come on when it is below 16F or if the calibration routine isn't complete. And it stays on until it warms up or the steering position is calibrated. During this time the AH will not be working.

The AHS requires a few seconds of driving straight during the first 30 seconds to calibrate the steering position sensor. If you are immediately turning when you start driving, it will take a little while for it to calibrate. Autocrossers have noticed this when they start their car at the line and immediately go into a turn. So, they have to start their car early and leave the engine running for a bit.

To determine the temperature, the AHS uses the Intake Air Temperature (IAT). If the sensor is loose or malfunctioning, the car will think it is too cold. Sometimes after an airbox installation this may occur.
_________________________
99 Navy Blue Metallic, black interior, 6 spd, Z51, HUD, R8C (Museum Delivery featured in the Jan 02 issue of Vette)

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#11284 - 05/29/02 02:04 PM Re: Service active handling???
Anonymous
Unregistered


Bruce is very correct.

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#11285 - 05/29/02 06:44 PM Re: Service active handling???
CVCVCV Offline
C5Forum Fanatic

Registered: 07/18/01
Posts: 286
Loc: Roseville CA
Quote:
Originally posted by GFC5:
[QB]To c4c5specialist....

1. Do you have any thoughts about the acceleration "hesitation" I experienced during the WOT passing....is it ignition, fuel, or just the auto tranny???? confused

QB]
Yes absolutely! This "hesitation" WAS simply the result of the Traction Control function kicking in!

Traction Control alleviates any perceived wheelspin condition (a rear wheel spinning faster than a front wheel) by reducing power. This lasts until the observed condition (= perceived wheelspin) goes away. The effect is somewhat like a very dramatic "lifting".

Perry [Rotate]
_________________________
Perry J Bird
Roseville CA
1998 Torch Red / Lt Oak Convertible A4
License: PERRY C5
NCM Member

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